Lathe attachment



Marel s, 1927. 1,619,832

vP. L. STARR LATHE ATTACHMENT Filed July 29. 1922 nun- Hllllll H'flllllllllll'lll AIIIWI-l Patented Mar. 8`, 1927.

UNITED STAT ES PATENT OFFHCE.

anat. Lnn saetta. or Deiner-e, MIoHIGAN.

Application filed July .2.9,

My invention relateS t0. a new and useful improvementI in a lathe attachment and has for its object the provision of means` for rapidly and eiliciently mov-ing the cutting tool relatively to the Work pieee.

Anotherobject of the invention is the provision in a enttinstool. holder of means for quickly and easily changing the angleoif the tool holder relatively to the Work piece and of looking Said holder in various positions. j Another ela-ieet otthe invention is the provision in a lathe attaehinent oiineane for ad: vancing and withdrawing the cutting toe] toward or from the work piece as the same 1s worked upon.

Another object of the invention is the provision in a lathe attaehnient oi ineens for quickly and easily moving the cutting tool into` or out of engagement with the work piece` Other ohieete vill appear hereinafterrIjhe invention consists in the combination and arrangement of parts hereinafter deeorbetl. and elanieol- The invention will he heet understood by reference to the accompanying drawings which :form a part `of this specification and vvlieln f Fig 1 is a side elevational view of the inveiation,V

Fig. 2 is a top plan view of the invention7 Fig. 3 is a sectional view takenon substantially line 3 3 of Fig. 2;,

Fig. l is a view taken on substantially line 1g-4. of Fie. 3, and

Fig.` is a perspective view of one of the wedges used in theJ inve-ntion.

Although the inyention is. adapted "for nee on the. ordinary Standard lathe lhaye Shown it applied, to a dieearelefl eylnfler `bleek .9' oi a, motor ear, thus illustrating the ennplieity with. whieh a utilityv lathe in ay he ooneti-neteel by one Who. eloee` not poseeeev a lathe bed and demonstrating how )the invention may be thus utilized. 'The device is shown mounted upon the hase of a Cylinder bleek which is providedat eacliside with a flange to which is secured by means of` suitable screws thev drip pan for the automobile. LSeemed to. one of these flanges hy lneaneoi suitable screws o r bolts 10. is a cylindrical rod 10` Whieh has one oliv iteeiflee, ilatteneel Se to provide a, resting enriaee to en- 0fase the upper Side. of the.Y flange, The ange 1l at they other side. 0f the 'Cylinder 19221-l Steliel N0 575%,4311' block serves as a guide for the turret sup?, port, aS will appear herein` Mounted upon thejblock are suitable bearings 12 and 13 in whieh is journaled a shaft 1,4 tolone end of which is mounted gear 1.5, adapted to vmesh with the gear 16 which is ixedly mounted upon the shaft 1,7 which is projected through the .block and journaled in suitable bearings, the shaft 17 being provided at one end with a Coupling nieinloeji." 1S.

A housing is provided which' embodies a supporting platform 19 having a downwardly depending portion 20, the lower end 21 of which is curved so as to embrace the rod 1() at one side thereof. Secured to the end 21 by means of a suitable `bolt is an arm 22 having its lower end curved to partially surround the rod 107V the construction being such that upon tightening the bolt which secures thev member 22 to the lower end of the member 201, the member- 2O will be secured -to the rod 1() in such a manner that it cannotbe removed therefrom without loosening` the bolt projected through the members 20,. and 22 and yet permitting,r the member 20 to slide longitudinally of the rod. Theopposite side of the meinber- 19 is provided with a downwardly depending leg-,forming portion 23 which has a flange 24 formed at the lower end thereof adapted to .engage between a guide clip 24J andthe flange 11, a suitable bolt 25serving to secure the clip in :position on the bleek. 9,

J-ormed in the` supporting platform i9 le anopening 26(7 the opening being provided with apcripheral at itsI antler eide. A

head 2 8; which ie provtletl with a bore ie, Se

eared,` by nieane oi' pin 29v to5 an 3.0 which is projected through the bore o the head anel ie maintained therein in free swinging relation transversely to the pin. The upper end `of the arm 25,0, is laterally turned to `provide a portion 3l in. which ie ,formeel a here which is interiorly threaded for .the retention of the threaded ineniber 32 which yis p,ibviledat its upper end with a suitable hand wheel or other suitable ineane for rotating the ineinloer' 32- The lowerend of the member 32 is secured to the member Belin free rotatable relation thereto by means ofa ball and socket joint. The member 34' comprises a neck portion which embraces the arm 3Q and is provided with downwardly depending lugs 35 which are secured to thev pin 29. y'Radiating outwardly from the neck portion or hub 34 is a pair of arms 36 and 37 which are diametrically opposite each other. These arms project beyond the periphery of a ring 38 which is positioned in embracing relation to the arm upon the head 28 so as rest loosely thereon. The ring 38 is provided with circumferential flanges 40 and 41, which flanges serve as guide members to retain the ring in position on the head. The llange 41 is pro vided at opposite sides with slots 43 to permit the passage of a bolt therein sulhciently to project into a threaded socket formed in the wedge members to'retain Vthe same in proper circumferential `position rela-tively to the ring 38. Projecting outwardly from the ring 38 is an arm 45 which is connected by a swivel connection 46 to another arm 45 the outer end of which, as shown in Fig. 1, is provided with an elongated slot in which rides a stud 56 which projects upwardly from a sleeve 57 slideablypositioned on the arm 58 which is mounted upon the block 9 so as to swing thereon and which may be locked ixedly relatively to the block by means of the wing nut 59. As shown in Fig. 3, the ring 38 is provided at the base of the flange 40 with a bevel groove 52 in which engages the under bevel surface 48 of a wedge member which is positioned on the ring 38. Two ot these wedges are used. They are positioned on the ring 38 and secured thereon, diametrically opposite each other by means of a. bolt projected through the slot 43. As shown in Fig. 5, these wedges Vare provided with a beveledunder surrace Vand ltaper to a point 50, the end 49 being the thickest end. They are positioned within the flange 40, as'shown in Fig. 4, so that their upper surfaces may engage the lower or under surface of the arms 36 and 37 Projected through the flange 40 are set screws 53 and 54 which are adapted to engage the periphery of the wedge members so as to torce the same inwardly of the ring 38 and thereby raise them on the beveled edge of the groove 52 so as to cause the wedges to press more tightly against the under surface of the arms k36 and 37.

A side member 6() projects outwardly from the leg20 and is connected by a cross member 60 to an extension 61 ot the flange '23. Depending from the cross member 60 is a leg 62 which is provided at its lower end with a pocket 63 provided at one side with a slot 64 in which a split nut of the conventional type may be placed. At the opposite side ot the pocket is another slot from which project the hand grips designed to operate a pair of jaws for maintaining the split nut in closed relation to a threaded member 65 projected therethrough, said member G5 being rigidly attached to the coupling 18.

.Mounted on the cylinder block is a bearing 66 in which is mounted a sleeve 67 projected through which is a centering spindle 68, provided with a suitable hand wheel 69 for rotating said spindle and threading it toward and awa-y from the work piece, 70. A cutting tool 71 is mounted in the lower end of the arm 30 and adapted to engage andoperate upon the work piece.

A suitable chuck is mounted upon the shaft 14 and serves to retain the work piece placed therein in the proper position for the operation, the'chuck being of conventional design. In operation the work piece is placed in the chuck and the centering spindle is moved into engagement with the work piece. The cutting tool is then pla-ced in the proper operative relation to the work piece and power transmitted to the shaft 14 or the shaft 17. This causes a rotation ot the work piece and also causes a rotation or" the shaft 17. l/Vhen it is desired to thread a member, the member chosen is provided with the nature of the thread desired on the work piece and the split nut selected to mesh with the threads on the member 65. When the shaft 17 rotates this causes a feeding of the member 65 through the nut thereby bringing about a sliding movement of the turret head and support along the block so as to present the work piece along the cutting tool, as Vwill be readily understood.

It will be noted that as the member 32 is rotated the arm 30 is caused to swing on the pin 29 as a pivot. The wedge members serve as a base for the arms 36 and 37. The arm 45 is moved into the position which locks the member 34 in rigid position. The mein` ber 32 is then rotated until the cutting tool makes the desired engagement with the. work piece. After the desired distance has bee-n traveled on the work piece the arm 45 is moved so as to release thepressure on the wedges on the arms 36 and 37. -This permits the disengagement of the cutting tool from the work piece and permits its removal to the point of beginning on the work piece so that in cutting threads the original adjustment of the member 32 is retained for a recutting of the threads being formed. As the cutting progresses the member 32 permits of adjustment or' the cutting tool relathe sleeve travels along the arm 58 and a gradual turning ot the Wedges relatively to the head and arms 36 and 37 takes place thus bringing about a greater swing or a less swing; as desired, of the arm 30. The armV 58 may be locked on the block 9 in a posi tion so as to be inclined toward the housing or away from it, depending upon Whether the small point of the taper is the starting point or the large part. It is believed to be evident that the connection at the arm 58 is dispensed with unless it is desired to cut a taper. 'lt will be noted that the arm 30 swings in its adjustment as a radius and that the head 28 may be adjusted circumterentially of the supporting platform by means of the screws 72. The wedges are positioned on the ring 38 with their thin ends toward each other so that there is a gradual approach of the thick end of one member as the thin end of the other member approaches the arms 36 and 87. rllhe position of the wedge members 47 and 5l may be altered on the ring by means of the securing bolts del', as it may not always be desired to have the same diametric'ally opposite each other.

vWhile I have illustrated and described the preferred forms of construction do not desire to limit myself to the precise forms ot structure shown but wish to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. In a device of the class described, a tool holder; means for adjusting the angular position ot' said holder relatively to the work piece; wedge members for locking said holder in adjusted position; a ring for supporting said Wedge members; and meansfor rotating said ring for releasing said holder for movement relatively to the work piece without disturbing the angular. adjustment thereof.

2. In a device of the class described, a tool holder; a supporting member having an angularly turned end provided with threaded 'opening formed therein; a plate having piece; means for locking said holder in adjusted position; a ring for supporting said locking means; and means for rotating said ring for releasing said holder for movement relatively to the work piece Without disturbing the angular adjustment thereof.

4. In a device of the class described, a tool holder; a supporting member having an angularly turned end provided with a threaded opening formed therein; a plate having an opening for accommodating said supporting member; threaded means proj ecting through said opening and secured at one end swivelly to said plate; adjusting means for engaging the under surface of said plate; and a ring having a groove formed on its upper surface for engaging said adjusting means,

ln testimony whereof l have hereunto set my hand at Detroit1 in the county ot Vayne and State of Michigan.

PERL LEE STARR. 

